Is a 6.5-digit meter a nanovolt meter?

No. According to the query on the website of Guangzhou Medak Data Technology Co., Ltd.

1. Official announcement: Keithley 20006 and a half digit multimeter Chinese manual. Time: October 19, 2018 Keithley20006 and a half digit multimeter Keithley six and a half digit multimeter. Brand: Keithley Model 2000 1/62 digital multimeter from the United States is a fast, accurate and highly reliable instrument that is easy to learn, easy to use and affordable. With a wide measurement range and high accuracy for DC voltages from 100 nanovolts to 1 kV and basic accuracy of 90 days for DC resistance from 100 mu to 100 meters basic accuracy the meter provides excellent measurement speed within six It can reach 50 readings per second through the IEEE488 bus at 1.5 seconds, and 2000 readings per second at 1/42 hours. It is stored in the internal buffer of 1024 readings, making it an excellent choice for fast measurements. The 2000 meter has 13 measurement functions, including DC voltage, current, AC voltage, current, 2-wire, 4-wire resistance, frequency, period, decibel, decibel milliwatt, and temperature, continuity, and diode measurement functions.

2. Product introduction: 18 measurement functions: DC voltage and current, AC voltage and current, AC and DC superimposed voltage and current, 2-wire and 4-wire resistance, frequency period, decibels and decibel milliwatts, crest factor , spike glitches, time scale, online current, RTD thermocouple temperature measurement, lead resistance measurement. Simultaneous measurement and display of multiple parameters: peak, average and true RMS response: data storage 8 capacity 32 capacity 128 capacity optional: decibel 140 decibels, pressure 90 decibels: integration period adjustable from 0.0110 PLC, two digital filtering: switch 1 input and 4 outputs: high and low limits can be set, failure indication: 488 interface can directly drive printer data hard copy: patented trigger connection function, trigger delay single book number 2 microseconds: rear panel slot can be equipped with 10-channel scanning card or thermoelectric Even temperature measurement card can also be equipped with 1801 nanovolt preamplifier.